Apparatus for polishing glass.



N0. 639,04l. Patented D86. l7. IQUI.

L. H. DELLUYE.

APPARATUS FOR POLISHING GLASS.

(Application filed Dec. 12, 1899.]

(No Model.)

5 Sheets-Shaet I.

ATTORNEYS F V NTOR %W M @W m W WITNESSES M M No. 689,0,4l. Patented Dec. l7, I901].

L. H. DELLOYE.

APPARATUS FOR POLISHING GLASS. (Application filed Dec. 12. 1899.)

(No Model.)

5 Shanta-Sheet 2.

wmvesses INVENTOR MM lagmm 23W ATTQ R N EYS m: NORRIS PETERS $6., PHDTO-LITHQ. wAsHmnTcNl o. c

No. 689,04l. Patented Dec; 17, 190i. L. H. DELLUYE. APPARATUS FOR POLISHING GLASS.

(Application filed Dec. 12, 1899.)

5 Sheets-Sheet 4.

(No Model.)

NVENTOK L Mm WITNESSES ATTORNEYS TH: NOfiRIS PETERS cu, FNOTO-LITHO. WASHINGTON. n. c

LUCIEN HENRI DELLOYE, OF PARIS, FRANCE, ASSIGNOR TO THE MANUFAC- TURESQDES GLACES ET PRODUITS OHIMIQUES DE ST. GOBAIN CHAUNY &

OIREY, OF PARIS, FRANCE.

APPARATUS FOR POLISHING GLASS.

SPECIFICATION forming part of Letters Patent N0. 689,041, dated December 17, 1901.

' Application filed December 12, 1399. Serial No, 740,106- (No model.)

To all whom it may concern:

Be it known that I, LUCIEN HENRI DEL- LOYE, a citizen of the Republic of France, residingin Paris, France, have invented certain new and useful Improvements Relating to Apparatus for Polishing Glass, of which the following is a specification.

The present invention has reference to certain improvements relating to apparatus for polishing glass, the chief object of the invention being to construct the mechanism which carries the rubbers for polishing the glass in the form of a single plate, the axis of which is eccentric relatively to the axis of the plat- {bran upon which the glass to be polished is Theinvention also includes certain devices for operating the platform and for feeding the polishing material to the rubbers, which will be hereinafter described.

It is known that the polishing apparatus in use at the present time is divided into the two principal classes or types as follows:

The beam fypc.-In this apparatus the rubbers are arranged upon a frame carried by four cranks, (or more.) These frames, which were at first used with rectangular tables, were afterward applied to circular tables, the reciprocating movement of the rectangular ta- 3o bles being replaced by a slow rotary movement of the circular tables. A regular and rapid polishing action was thus secured, but from a mechanical point of View these apparatus are complicated and are liable to strains, which soon cause them to get out of order.

llIuZtc'pZe-plazfe type.--This apparatus, composed of two or more plates turning with a continuous rotary motion upon the circular 40 table carrying the glass, was formerly employed for grinding. Then it was used for polishing by replacing the disks or other appliance for working the glass by a like number of plates furnished with rubbers. This apparatus works better than the preceding type from a kinematic point of view, but does not effect an even or regular polishing. This beingso, the invention embraces, in principle, a polishing apparatus with a single plate,

which allows of the realization (in an apparatus in which the parts move with a continuous rotary motion about fixed axes) of conditions of work heretofore obtained by the use of beamapparatus orframes supported upon cranks with a vertical axis without presenting their disadvantages. The polishers are all fixed under a single plate, the diameter of which is preferably little less than that of the table above. The vertical shaft carrying the plate is guided in supports forming part of a fixed framework, and the position of this shaft isso regulated thatits axis meetsthe upper surface of the table a point the distance (say 00) of which to the center of the platform corresponds to the radius of the crank which is used to drive the frame in a beam apparatus. If now rotary movements of equal speed and in the same direction he imparted to the table and plate arranged as above described, there is obtained between the rubbers or polishers and the glass a relative displacement, which reproduces the ordinary working of the beam apparatus. As there is every facility for placing the polishers at any point of the plate, the friction may be divided up so as to insure a polish practically uniform at all points, and as each polisher describes upon the glass the same path as in the beam apparatus mounted upon cranks all the qualities of these latter apparatus will be preserved from the point of View of the production and utilization of the motive force, while at the same time avoiding the disadvantages which arise from a mechanical point of view in the beam apparatus. The construction of the apparatus is also of extreme simplicity, being reduced to two superposed disks carried each upon a vertical shaft. It is enough, moreover, in practice to operate one of these shafts, (say the shaft of the platform upon which the glass is held, or the rubber-shaft,) the moving part, which is not directly driven, being set in motion by friction of contact and moving, at nearly the same speed of rotation as the driven part, with a slight loss of rotation, which is just suificient to slightly renew the contacts. By gradually displacing the polishers, so that they shall not always attack the same spot on the table, the uniformity of the polishing action is improved.

One of the principal ad vantages of the platform polisher with its single eccentric plate is, in addition to those already above enumerated, that it affords the possibility of driving at will either the platform or the plate, this possibility being non-existent in any of the systems now in use and offering in many cases facilities of installation, transmission of power being either above or below ground, as may be desired.

The drawings accompanying the present specification show, by way of example, a polishing apparatus having the peculiarities above set forth.

In the drawings, Figure 1 is an elevation, partly in section. on the line A B of Fig. 3 of the apparatus. Fig. 2 is an elevation thereof, partly in section, on the line C D of Fig. 3 that is to say, at ninety degrees to the preceding. Fig. 3 is a horizontal section thereof on the line E F of Fig. 1. Fig, 4 is an elevation, on a larger scale, of the plate, showing the method of feeding the polishing medium, which will be hereinafter described. Fig. 5 is a corresponding partial plan view thereof; and Fig. 6 is a section, on a still larger scale, of the gutter or passage distributing the polishing medium.

In the several figures, a denotes the circular platform or table, upon which the glass to be polished is secured. This platform is mounted, as usual, upon wheels'b, traveling upon rails laid on the floor of the workshop. At the time of polishing this platform rests upon the plate 0, carried by the vertical shaft d, which is supported in the step-bearing e and receives its motion through the intermediary of a pair of miter-wheelsfand g and from-the shaft h, provided with fast and loose pulleys The single plate m, furnished with rubbers 7c, is carried by the shaft Z, suspended by links a n from one end of a beam 0, mounted freely, by means of a knife-edge 13, upon a block q, carried by the fixed headpiece r. The other end. of the beam 0 carries a counter-weighted rod 8, the lower end of which is screw-threaded to receive a nut t, forming an adjustable stop againstasleeve u, secured to the walls. The weight of the plate m is thus partially compensated for by the counterweight, the nut 75 servingto control at pleasure the descent of the said plate. The fixed head 1 may be supported by a series of stays 1;, columns to, and struts or shores 1 forming a rigid triangle resting at its extremit-ies'upon the masonry of the apsunk in the ground below the floor of the workshop; but, as already specified, if the exigencies of the workshop admit of it the plate m might have the motion imparted to it, the other movable part a being then carried around by friction of contact. In this well is also situated the mechanism employed for throwing the platform charged with glass into and out of action.

The table Ct when introduced into the apparatus runs upon the rails 2, which are for a certain length fixed to two short movable beams or girders 3. These beams or girders each carry two vertical rods 4, like pillars, the lower ends of which are jointed to the levers 5, coupled in pairs. A shaft 6, with cranks 7 7, placed beneath the levers and transversely thereto, receives motion from an endless screw or worm 8 upon a shaft 9 parallel to the shaft h and receiving its motion from this shaft through a belt 10, passing over the fast and loose pulleys 11 on the shaft 9. The endless screw or worm en gages with ahelically-toothed or worm wheel 12, which transmits motion to the shaft 6 through the gears 13 and 14:. As the cranks are connected by links 15 to the ends 16 of the levers 5, they may be easily alternately raised and lowered by shifting the belt 10 onto the fixed pulley of the shaft 9. The beams are therefore raised and lowered so as to come in contact with or recede from the wheels of the table a, which is (as the case may be) released from the pivot or lowered onto it. The use of cranks offers the advantage of being able to limit the travel of the levers. The shaft 9 is thrown into action by hand, but is thrown out of action automatically, this being effected by means of cams. To this end the belt 10 is provided with a beltshipping rod l7,att-ached to a counterweighted lever 18. By throwing this lever over from the right to the left the belt 10 is shifted onto the fast pulley on the shaft 9. On the other hand, the shaft 6 carries cams 19, acting upon a second rod 20, similarly connected to the counterweighted lever 18, in such manner that at the end of each half-revolution of the shaft 6 thecounterweighted lever is automatically pushed over from left to right and the mechanism thrown out of action.

Figs. 4, 5, and 6 of the drawings illustrate another form of detail. This arrangement has reference to the feeding of the polishing material. To insure uniformity of action, it is necessary to feed the whole of the polishing-rubbers with water charged with material (say rouge dAngleterre) regularly and in very small quantities. This result is attained by fitting the plate m with an annular gutter 21, provided with small tubes 22, leading from it (bolted to the gutter,as shown in Fig. 6) and having their outlets near the various rubbers k. The gutter revolves with the plate, and by causing a thin stream of liquid to run into it from a fixed point a uniform feed is obtained. The liquid which runs into the gutter is prepared in a small cylindrical reservoir 23, wherein are placed the water and the polishing material and which is kept in suspension by an agitator 24-. To regulate the tlow,itl1as been necessary to resort to an expedient in view of the impossibility of employing a tap with a small delivery for the muddy liquid. To this end the reservoir has at its upper end a spout 25, forming the outlet, and a small tap in a pipe for the supply of clear water serves to regulate the stream of liquid admitted to the reservoir. This latter is first filled with water and the polishing material placed at the bottom,mixing with the whole mass of liquid, it suffices to so regulate the inlet of clear water that a corresponding quantity of the rougeladen liquid shall escape by the overflowspout and be distributed by passing through the fixed pipe 26 and by the rotating gutter 21 to all the polishing-rubbers.

I would remark, in conclusion, that I do not limit myself to the forms, dimensions, and details of construction above described and shown in the drawings.

For example, the table carrying the glass and the plate for the rubbers may both be square,rectangular, or of any polygonal form. In this case, however, it will be necessary to drive both at the same speed, as it is evident that the one of them could not be retarded with respect to the other. In the case where these parts are both circular if it is desired that they may be both driven they may have rotary motion in the same direction, but at slightly different speeds, imparted to them to set up the necessary drag between them;

, but it is manifestly more simple to drive only are adapted to cover the entire surface and means for turning both the plate with its series of rubbers and the platform in the same direction.

2. An apparatus for polishing glass comprising a platform for the glass, a series of polishing-rubbers and a plate carrying the ing both the plate, with its series of rubbers,

and the platform in the same direction but at different speeds.

3. An apparatus for polishing glass, comprising a platform for the glass, a series of polishing-rubbers and a plate carrying the rubbers, said plate with its series of rubbers and said platform being substantially of the same diameter and mounted to turn eccentrically to each other to a slight degree,whereby the rubbers are adapted tocover the entire surface, and means for turning the platform, the plate being adapted to be turned in the same direction as the platform through frictional contact therewith.

4. An apparatus for polishing glass having a plate, rubbers thereon, a gutter on the plate and distributing-tubes from the gutter to the rubbers, substantially as described.

5. An apparatus for polishing glass hav ing a plate, rubbers thereon, a gutter on the plate and distributing-tubes from the gutter to the rubbers, and a reservoir to hold the polishing material, having an agitator, and a spout to supply the material to the gutter.

6. Mechanism for lifting a platform of a glass-polishing machine, consisting of rails, rods 4, levers connected thereto, a crank shaft, cranks thereon to operate said levers, whereby the rails are lifted to a certain predetermined distance, a shaft 9, and means for operating said crank-shaft from said shaft 9, in combination with a hand-operated lever to throw shaft 9 into operation, and automatic means to control said hand-operated lever to throw the shaft 9 out of operation when the cranks and rails have reached said predetermined distance in their travel.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LUCIEN HENRI DELLOYE.

Witnesses:

EDWARD P. MAOLEAN, CHARLES DONY. 

